dt-bindings: Reference opp-v1 schema in CPU schemas

The opp-v1 binding is only used in MIPS and arm32 CPU nodes, so add a
$ref to it in the CPU schemas and drop the "select".

As opp-v1 has long been deprecated, mark it as such.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20250410-dt-cpu-schema-v2-14-63d7dc9ddd0a@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/arm/cpus.yaml

@@ -353,6 +353,7 @@ properties:
       physical start address it should jump to.
 
 allOf:
+  - $ref: /schemas/opp/opp-v1.yaml#
   - if:
       # If the enable-method property contains one of those values
       properties:

Documentation/devicetree/bindings/mips/cpus.yaml

@@ -50,6 +50,7 @@ properties:
   device_type: true
 
 allOf:
+  - $ref: /schemas/opp/opp-v1.yaml#
   - if:
       properties:
         compatible:
@@ -68,7 +69,7 @@ required:
   - compatible
   - reg
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |

Documentation/devicetree/bindings/opp/opp-v1.yaml

@@ -18,7 +18,7 @@ description: |+
 
   This binding only supports voltage-frequency pairs.
 
-select: true
+deprecated: true
 
 properties:
   operating-points: